Câmara Semi-anecóica Simples mas Eficaz para a Caracterização Acústica de um ARLVC (A Simple yet Effective Semi-Anechoic Chamber for the Acoustic Characterization of an LSRA)

José A. Salvado (jsalvado@ieee.org)1, Maria R. Calado (rc@ubi.pt)2, António Espirito Santo (aes@ubi.pt)2


1EST-IPCB
2DEM-UBI

This paper appears in: Revista IEEE América Latina

Publication Date: Sept. 2013
Volume: 11,   Issue: 5 
ISSN: 1548-0992


Abstract:
This paper presents a simple and cost effective solution of a semi-anechoic chamber suitable for the acoustic noise characterization of a Linear Switched Reluctance Actuator (LSRA). Using simple construction and assembling techniques, and low-cost materials, it allows significant acoustic isolation characteristics from the environmental noise, caused by people´s activities, other machinery operation, etc. The average attenuation achieved is better than 30 dB for a noise source place at 1 meter distance from its walls. The overall test results demonstrate an affordable yet effective semi-anechoic chamber solution, and prove its adequacy for the specific purpose of characterizing a LSRA in terms of the acoustic noise produced.

Index Terms:
Acoustics, Noise characterization, Semi-anechoic Chamber, Switched reluctance actuators   


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